The boards on the bench.
Drawn simply, specified properly.
Every lesson runs on one of these 10 board models. They are simplified drawings made for teaching, and they follow the specifications of the boards they are based on, so what you learn carries over.
Loading the boards
Not sure where to start? Begin with the Uno-style board. The first Arduino lessons use it, and the ideas carry over to every other board here.
Arduino, ESP32, Raspberry Pi, Pico, NVIDIA and Jetson are trademarks of their owners. These are stylised models, not product images, and Tinker Lab is not affiliated with the makers. Before you connect a real board, check its own pinout.